6485632240 has 80 divisors (see below), whose sum is σ = 15363391680. Its totient is φ = 2545551360.

The previous prime is 6485632229. The next prime is 6485632247. The reversal of 6485632240 is 422365846.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6485632193 and 6485632202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6485632247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2375196 + ... + 2377924.

It is an arithmetic number, because the mean of its divisors is an integer number (192042396).

Almost surely, 2^6485632240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6485632240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7681695840).

6485632240 is an abundant number, since it is smaller than the sum of its proper divisors (8877759440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6485632240 is a wasteful number, since it uses less digits than its factorization.

6485632240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290 (or 3284 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 6485632240 is about 80533.4231235703. The cubic root of 6485632240 is about 1864.8794915749.

The spelling of 6485632240 in words is "six billion, four hundred eighty-five million, six hundred thirty-two thousand, two hundred forty".